While exciting, I can’t help but agree with the other comment here. It doesn’t seem like a new field, but rather the expansion of existing wiring fields. Many companies have employees like tech writers who focus on getting the fine details of each word right – not unlike what you’ve listed here.
It seems the UX Writer itself isn’t enough of a role, based on what’s provided here. It sounds like the ideal avenue for people like me dedicated to breaking into the field, but the work almost seems too narrow.
What other responsibilities would justify creating a separate role specifically for a UX Writer?